Advice needed for basketball store owner

[Bad Zebra]

A couple ideas for "Accessories"...

-Shirt stays- Elastic bands with clips on both ends. Connects to top of sock/hose and bottom of shirt to keep the sirt tucked neatly (I currently buy them on Amazon)
- That rubber belt thingy that you wrap around your waist with little rubber nubs that also keep shirt tucked (alternative to "Stays") Anybody know the brand/product name of those? Maybe Magic Belt or something?
-Court diagram with little magnets and color coded coverage areas.

Also, under compression gear, you can lose the long sleeve shirt. All basketball officials wear short sleeves.